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The role of the intestinal parasite<jats:italic>Synthesium pontoporiae<\/jats:italic>(Digenea: Brachycladiidae) as a possible biological marker to differentiate<jats:italic>P. blainvillei<\/jats:italic>stocks was evaluated using nuclear and mitochondrial DNA markers. Internal transcribed sequence 1 and 2 (ITS1 and ITS2) regions of<jats:italic>S. pontoporiae<\/jats:italic>did not show intraspecific variability. The mitochondrial NADH dehydrogenase subunit 3 (ND3) and cytochrome oxidase subunit I (COI) gene sequences suggested lack of population structure in<jats:italic>S. pontoporiae<\/jats:italic>and population expansion. The apparent panmixia of<jats:italic>S. pontoporiae<\/jats:italic>may be due to the high mobility of one or more of its intermediary hosts. Alternatively, it may be due to the small sample size. This result is incongruent with the previously proposed FMA.<\/jats:p>","DOI":"10.1017\/s0022149x13000540","type":"journal-article","created":{"date-parts":[[2013,9,11]],"date-time":"2013-09-11T04:54:19Z","timestamp":1378875259000},"page":"19-27","source":"Crossref","is-referenced-by-count":15,"title":["Genetic diversity and population structure of<i>Synthesium pontoporiae<\/i>(Digenea, Brachycladiidae) linked to its definitive host stocks, the endangered Franciscana dolphin,<i>Pontoporia blainvillei<\/i>(Pontoporiidae) off the coast of Brazil and Argentina"],"prefix":"10.1017","volume":"89","author":[{"given":"J.","family":"Marigo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H.A.","family":"Cunha","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C.P.","family":"Bertozzi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.P.","family":"Souza","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F.C.W.","family":"Rosas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.J.","family":"Cremer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.S.","family":"Barreto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.R.","family":"de Oliveira","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H.L.","family":"Cappozzo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.L.S.","family":"Valente","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C.P.","family":"Santos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.C.P.","family":"Vicente","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2013,9,9]]},"reference":[{"key":"S0022149X13000540_ref47","volume-title":"Dolphins, porpoises and whales: 1994\u20131998 Action Plan for the Conservation of Cetaceans","author":"Reeves","year":"1994"},{"key":"S0022149X13000540_ref64","doi-asserted-by":"publisher","DOI":"10.1007\/PL00008561"},{"key":"S0022149X13000540_ref42","unstructured":"Pinedo M.C. 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